Much better and they dont try to sell you anything. Made by microsoft and completely free. it catches more crap than the kaspersky i run on the pcs at work

Defrag, Disk clean up and , CHKDSK are also great helpers built into the OS.

PS virus protection/ malware protection are the same. malware is a blanket term. the companies throw out malware, spyware, virus, worm, etc to scare the **** out of you and confuse you into buying products. I can explain in detail about each if you really want. ram will help you get the computer running fast enough to fix it but it wont fix your problem.